527
FNCA52 TJSJ 140730
FWFSJU
FIRE WEATHER PLANNING FORECAST FOR PUERTO RICO
NATIONAL WEATHER SERVICE SAN JUAN PR
330 AM AST FRI AUG 14 2026
DISCUSSION
ELEVATED FIRE DANGER IS EXPECTED TODAY AS LOW RELATIVE HUMIDITY,
DRY FUELS AND SOILS, AND STRONG EASTERLY WINDS FAVOR RAPID FIRE
SPREAD, PARTICULARLY ACROSS THE SOUTHERN COASTAL PLAIN AND
ADJACENT SLOPES OF PUERTO RICO. A FIRE DANGER STATEMENT WILL BE
IN EFFECT.
DRY AND BREEZY CONDITIONS WILL CONTINUE THROUGH MUCH OF SATURDAY
BEFORE INCREASING MOISTURE SATURDAY NIGHT INTO SUNDAY RAISES
RELATIVE HUMIDITY AND REDUCES FIRE WEATHER CONCERNS.
PRZ014-142000-
SOUTHEAST COASTAL PLAINS-
330 AM AST FRI AUG 14 2026
TODAY TONIGHT SAT
CLOUD COVER MCLEAR MCLEAR MCLEAR
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 10 10 0
TEMP (24H TREND) 93 (+2) 76 (-2) 94
RH % (24H TREND) 45 (-7) 85 (+4) 38
WIND 20FT/EARLY(MPH) E 20 NE 16 E 24 G32
WIND 20FT/LATE(MPH) E 21 NE 16 E 24 G32
MIXING HGT(FT-AGL/MSL)5260 5900
TRANSPORT WND (MPH) E 29 E 28
VENT RATE (KT-FT) 131500 141600
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ015-142000-
SOUTHERN HILLS-
330 AM AST FRI AUG 14 2026
TODAY TONIGHT SAT
CLOUD COVER MCLEAR MCLEAR MCLEAR
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 0 20 10
TEMP (24H TREND) 90 (+4) 72 (-3) 91
RH % (24H TREND) 53 (-4) 96 (+8) 52
WIND 20FT/EARLY(MPH) E 16 NE 17 NE 19
WIND 20FT/LATE(MPH) E 17 NE 17 NE 19
MIXING HGT(FT-AGL/MSL)5880 6460
TRANSPORT WND (MPH) E 28 E 28
VENT RATE (KT-FT) 141120 155040
DISPERSION 5 5
DSI 6 4 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ016-142000-
NORTH COASTAL PLAINS-
330 AM AST FRI AUG 14 2026
TODAY TONIGHT SAT
CLOUD COVER MCLEAR PCLDY MCLEAR
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 10 20 20
TEMP (24H TREND) 91 (-1) 76 (-2) 91
RH % (24H TREND) 58 (+1) 98 (+10) 60
WIND 20FT/EARLY(MPH) E 17 E 23 E 20
WIND 20FT/LATE(MPH) E 24 E 20 E 21
MIXING HGT(FT-AGL/MSL)5420 5290
TRANSPORT WND (MPH) E 26 E 30
VENT RATE (KT-FT) 124660 137540
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ017-142000-
NORTHERN HILLS-
330 AM AST FRI AUG 14 2026
TODAY TONIGHT SAT
CLOUD COVER MCLEAR MCLEAR MCLEAR
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 0 10 10
TEMP (24H TREND) 90 (0) 73 (-1) 90
RH % (24H TREND) 60 (+5) 100 (+6) 60
WIND 20FT/EARLY(MPH) E 17 E 19 E 19
WIND 20FT/LATE(MPH) E 20 E 18 NE 21
MIXING HGT(FT-AGL/MSL)6050 5580
TRANSPORT WND (MPH) E 23 E 28
VENT RATE (KT-FT) 121000 133920
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ018-142000-
WEST COAST-
330 AM AST FRI AUG 14 2026
TODAY TONIGHT SAT
CLOUD COVER MCLEAR MCLEAR MCLEAR
PRECIP TYPE SHOWERS NONE SHOWERS
CHANCE PRECIP (%) 10 0 20
TEMP (24H TREND) 93 (0) 74 (-1) 94
RH % (24H TREND) 55 (+1) 95 (+5) 53
WIND 20FT/EARLY(MPH) E 17 E 23 E 19
WIND 20FT/LATE(MPH) E 19 E 20 E 24
MIXING HGT(FT-AGL/MSL)5480 6070
TRANSPORT WND (MPH) E 17 E 22
VENT RATE (KT-FT) 82200 115330
DISPERSION 5 5
DSI 6 5 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ019-142000-
EASTERN INTERIOR-
330 AM AST FRI AUG 14 2026
TODAY TONIGHT SAT
CLOUD COVER PCLDY PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 20 40 20
TEMP (24H TREND) 90 (+2) 74 (-3) 90
RH % (24H TREND) 58 (-1) 97 (+9) 59
WIND 20FT/EARLY(MPH) E 16 NE 17 E 18
WIND 20FT/LATE(MPH) E 16 E 18 NE 18
MIXING HGT(FT-AGL/MSL)5670 5700
TRANSPORT WND (MPH) E 25 E 29
VENT RATE (KT-FT) 124740 142500
DISPERSION 5 5
DSI 6 5 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ022-142000-
LUQUILLO MOUNTAIN RANGE-
330 AM AST FRI AUG 14 2026
TODAY TONIGHT SAT
CLOUD COVER PCLDY PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 30 40 30
TEMP (24H TREND) 86 (+4) 71 (-4) 86
RH % (24H TREND) 65 (-3) 100 (+11) 66
WIND 20FT/EARLY(MPH) E 13 E 14 E 16
WIND 20FT/LATE(MPH) E 13 E 14 E 17
MIXING HGT(FT-AGL/MSL)4960 5270
TRANSPORT WND (MPH) E 26 E 30
VENT RATE (KT-FT) 114080 137020
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ023-142000-
CENTRAL MOUNTAIN RANGE-
330 AM AST FRI AUG 14 2026
TODAY TONIGHT SAT
CLOUD COVER MCLEAR MCLEAR MCLEAR
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 0 10 10
TEMP (24H TREND) 89 (+5) 70 (-2) 88
RH % (24H TREND) 57 (-2) 100 (+5) 60
WIND 20FT/EARLY(MPH) E 12 NE 18 E 17
WIND 20FT/LATE(MPH) E 18 NE 17 NE 18
MIXING HGT(FT-AGL/MSL)7280 6570
TRANSPORT WND (MPH) E 22 E 25
VENT RATE (KT-FT) 138320 144540
DISPERSION 5 5
DSI 6 4 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ024-142000-
CAYEY MOUNTAIN RANGE-
330 AM AST FRI AUG 14 2026
TODAY TONIGHT SAT
CLOUD COVER PCLDY PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 30 30 20
TEMP (24H TREND) 86 (+3) 71 (-4) 86
RH % (24H TREND) 63 (-3) 99 (+8) 63
WIND 20FT/EARLY(MPH) E 14 NE 13 NE 18
WIND 20FT/LATE(MPH) E 16 NE 13 E 17
MIXING HGT(FT-AGL/MSL)5130 5430
TRANSPORT WND (MPH) E 29 E 30
VENT RATE (KT-FT) 128250 141180
DISPERSION 5 5
DSI 6 5 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ025-142000-
VIEQUES-
330 AM AST FRI AUG 14 2026
TODAY TONIGHT SAT
CLOUD COVER MCLEAR MCLEAR PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 10 10 30
TEMP (24H TREND) 90 (0) 79 (-2) 91
RH % (24H TREND) 57 (-5) 85 (+6) 56
WIND 20FT/EARLY(MPH) E 19 NE 20 E 20
WIND 20FT/LATE(MPH) E 18 E 23 NE 21
MIXING HGT(FT-AGL/MSL)4190 4390
TRANSPORT WND (MPH) E 29 E 31
VENT RATE (KT-FT) 104750 118530
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ026-142000-
CULEBRA-
330 AM AST FRI AUG 14 2026
TODAY TONIGHT SAT
CLOUD COVER MCLEAR MCLEAR PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 20 10 30
TEMP (24H TREND) 91 (+2) 79 (-3) 91
RH % (24H TREND) 62 (-5) 90 (+8) 60
WIND 20FT/EARLY(MPH) E 19 E 21 E 21
WIND 20FT/LATE(MPH) E 18 E 21 E 23
MIXING HGT(FT-AGL/MSL)4160 4560
TRANSPORT WND (MPH) E 30 E 31
VENT RATE (KT-FT) 108160 123120
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ027-142000-
SOUTHWEST COASTAL PLAINS AND MONA ISLAND-
330 AM AST FRI AUG 14 2026
TODAY TONIGHT SAT
CLOUD COVER MCLEAR MCLEAR MCLEAR
PRECIP TYPE NONE NONE SHOWERS
CHANCE PRECIP (%) 0 0 0
TEMP (24H TREND) 93 (+2) 75 (-3) 94
RH % (24H TREND) 46 (-8) 87 (+6) 38
WIND 20FT/EARLY(MPH) E 21 G29 E 21 E 20
WIND 20FT/LATE(MPH) E 25 E 20 E 25
MIXING HGT(FT-AGL/MSL)5580 6390
TRANSPORT WND (MPH) E 26 E 24
VENT RATE (KT-FT) 128340 134190
DISPERSION 5 5
DSI 6 4 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
VIZ001-142000-
SAINT THOMAS AND SAINT JOHN-
330 AM AST FRI AUG 14 2026
TODAY TONIGHT SAT
CLOUD COVER MCLEAR MCLEAR PCLDY
PRECIP TYPE SHOWERS NONE SHOWERS
CHANCE PRECIP (%) 20 0 30
TEMP (24H TREND) 89 (+2) 79 (-2) 89
RH % (24H TREND) 63 (-4) 91 (+10) 60
WIND 20FT/EARLY(MPH) E 20 E 21 E 21
WIND 20FT/LATE(MPH) E 19 E 21 E 23
MIXING HGT(FT-AGL/MSL)4150 4470
TRANSPORT WND (MPH) E 31 E 33
VENT RATE (KT-FT) 112050 129630
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
VIZ002-142000-
ST CROIX-
330 AM AST FRI AUG 14 2026
TODAY TONIGHT SAT
CLOUD COVER MCLEAR PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 10 20 40
TEMP (24H TREND) 90 (+2) 79 (-2) 90
RH % (24H TREND) 64 (-1) 89 (+7) 62
WIND 20FT/EARLY(MPH) E 19 NE 20 E 23
WIND 20FT/LATE(MPH) E 19 NE 20 E 24
MIXING HGT(FT-AGL/MSL)5080 4350
TRANSPORT WND (MPH) E 31 E 32
VENT RATE (KT-FT) 137160 121800
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
CLICK HERE TO GO TO PREVIOUS BULLETINS.
Main Text Page